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Finding the Fourth Proportional to 26,661.40, 39,972.90 and 14,978.20

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Solution

The fourth proportional to 26,661.40, 39,972.90 and 14,978.20 is: 22,456.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,661.40 : 39,972.90 = 14,978.20 : x
  2. Step 2: Convert to fraction form
    26,661.40/39,972.90 = 14,978.20/x
  3. Step 3: Cross multiply
    26,661.40x = 39,972.90 × 14,978.20
  4. Step 4: Simplify right side
    26,661.40x = 598,722,090.78
  5. Step 5: Solve for x
    x = 598,722,090.78/26,661.40
  6. Step 6: Final answer
    x = 22,456.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.